Description

Sodium Dihydrogen 5-(3-Sulphonatopropoxy)Isophthalate is a high-purity, water-soluble organic intermediate featuring a sulfonated aromatic structure. This compound matters for its role as a key building block in the synthesis of advanced dyes, optical brighteners, and specialty polymers, where its ionic and reactive groups enable precise molecular design. It is primarily needed by manufacturers in the fine chemical, textile chemical, and specialty polymer industries seeking to develop products with enhanced solubility, color fastness, or specific functional properties.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of water-soluble, high-performance azo and anthraquinone dyes for textiles and inks.
• Optical Brightener (OBA) Synthesis: Serves as a key monomer for manufacturing stilbene-based optical brightening agents used in paper, detergents, and plastics.
• Specialty Polymer Modification: Incorporated into polymer chains (e.g., polyesters, polyamides) to introduce sulfonate groups, improving dyeability, antistatic properties, and hydrophilicity.
• Liquid Crystal and Electronic Materials: Used in the development of ionic dopants and charge-transport materials for advanced display and electronic applications.
• Pharmaceutical Intermediate: Potential building block for synthesizing sulfonated drug molecules requiring enhanced solubility.
• Research & Development: Employed in academic and industrial R&D for exploring new functional materials and chemical processes.

Basic Information

Item	Detail
Product Name	Sodium Dihydrogen 5-(3-Sulphonatopropoxy)Isophthalate
CAS No.	66687-30-7
Molecular Formula	C11H11NaO8S
Molecular Weight	326.25 g/mol
Synonyms	5-(3-Sulfopropoxy)isophthalic Acid Disodium Salt; Disodium 5-(3-Sulfopropoxy)isophthalate; Sodium 5-(3-Sulfonatopropoxy)isophthalate; Isophthalic Acid, 5-(3-Sulfopropoxy)-, Disodium Salt; SPIP Disodium Salt; 66687-30-7; 5-(3-Sulfopropoxy)-1,3-benzenedicarboxylic Acid Disodium Salt
EINECS	Contact for details

Quality Control

Our Sodium Dihydrogen 5-(3-Sulphonatopropoxy)Isophthalate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical characteristics is provided with every shipment to guarantee traceability and compliance with your project requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which may affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
pH (5% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.